Vocal tract imaging for the vowels /i/ and /a/ using both EBCT and MRI was carried out for one subject (29 yr old male, native of midwestern United States) using an Imatron C-150 electron beam CT scanner and a GE Signa 1.5 Tesla scanner, respectively. Each image set was analyzed using a general display and quantitation package called VIDA$+TM$/ (Volumetric Image Display and Analysis). The image analysis consisted of segmenting the airspace from the surrounding tissue, obtaining a 3D vocal tract shape via shape based interpolation, and finally using an iterative bisection algorithm to determine the vocal tract area function. The results show that the 3D representations of the vocal tract shapes derived from EBCT show subtle deformations of the airway by articulatory structures and teeth that are not observed in the MRI based representations. Shaded surface renderings of each vocal tract shape and for each imaging technique are shown and the apparent trade-offs between the two imaging methods are discussed.
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机译：使用iMatron C-150电子束CT扫描仪和GE Signa进行元音/和/ A /使用EBCT和MRI的音乐道和/ a /使用EBCT和MRI 1.5特斯拉扫描仪分别。使用称为VIDA $ + TM $ /（体积图像显示和分析）的一般显示和定量包进行分析每个图像集。图像分析包括从周围组织分段，通过基于形状的插值来获得3D声道形状，并且最终使用迭代二分算法来确定声乐区域功能。结果表明，通过在基于MRI的表示中未观察到的铰接结构和牙齿，来自EBCT的声音结构的3D表示显示了气道的微妙变形。显示了每个声道形状和每个成像技术的阴影表面渲染，并讨论了两种成像方法之间的表观折衷。
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